Finding the Fourth Proportional to 12,938,814.80, 19,424,196.60 and 8,146,494.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,938,814.80 : 19,424,196.60 = 8,146,494.80 : x
2. Step 2: Convert to fraction form
   12,938,814.80/19,424,196.60 = 8,146,494.80/x
3. Step 3: Cross multiply
   12,938,814.80x = 19,424,196.60 × 8,146,494.80
4. Step 4: Simplify right side
   12,938,814.80x = 158,239,116,596,077.69
5. Step 5: Solve for x
   x = 158,239,116,596,077.69/12,938,814.80
6. Step 6: Final answer
   x = 12,229,799.95